Feed-water heater.



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FEED WATER HEATERI4 APPLICATION FILED MAR.17,1906.

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WILLIAM H.' BROWN, OE MINNEAPOLIS, MINNESOTA.

FEED-WATER HEATER.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed March 17| 1906. Serial No. 306.620-

To all whom it may concern:

Be it known that I, WILLIAM H. BROWN,

of Minneapolis, Hennepin county, Minnesota,

have invented certain Imlprovements in Feed- Water Heaters, of Whic thefollowing is a specification.

This invention relates to improvements in feed-water-heaters forboilers, and the invention is particularly adapted. for application tothe boilers of locomotives.

lThe obj ect of the invention is to provide a feed-water-heater by meansof which the Water may be raised toa high temperature before enteringthe boiler.

Other objects of the invention will appear from the following detaileddescription,` taken in connection with the accompanying drawings, inwhich,

Figure 1 is a side elevation of a locomotive boiler, partly broken away,and showing m improved feed-water-heaterapplied thereto. Fig. 2 is apartial side elevation of the receptacle or drum of thefeed-water-heater, showing the inclosing drum in longitudinal section.Fig. 3. is a vertical section on line 3 3 of Fig. 2. Fig. 4 is avertical section on line 1-4 of Fi 1. The locomotive-boiler 2 hereinshown may l be of any ordinary or preferred constructlon.

It is rovided with the usual grate `3, fire-box 4, tube-sheet 5, tubes6, smoke-box 7; smokestack 8, exhaust-nozzle 9 and netting 10. Above thefire-box ,4 is the usual crownsheet 11.

. exhaust from each engine cylinder.

Al Water-heating drum or chamber 12 is rovided, preferably ofcylindrical form, and having preferablyV the heads or end sheets 13-13.This chamber has connected to it a water sup ly or inlet pipe 14,provided with a suitable check-valve 15. The injector pipe connects withthe pipe 14, and by this means .the lwater to be heated is fed into theheating chamber or drum 12. A pipe 16 leads from the chamber 12 to theboiler, as hereinafter described.

The heating chamber 12 is arranged within a steam drum 17, provided withthe inlet pipes 18, one of which is connected to the At the opposite endof the drum 17 is the exit pipe 19 having a suitable regulating valve20. The exhaust steam from the engi-ne cylinders enters the drum throughthe pipes 18, passes 4Of these pipes is along and around the chamber 12,and also passes through the tubes 21, a series of which are arranged inlsaid heating chamber with their ends mounted in its end-plates. The

tubes 21 are preferably spirally coiled and I any desired part thereofmaybe arranged -in said chamber (see Figs. 2 and 3). The drum 17 isprovided with a suitable'covering 22, formed of asbestos, or othernon-conductor of heat. I prefer also to lprovide the small steam pipesy23 which extend from the pipes 18 and project into the water pipe 16.Each check-valve; and small jets of steam are injected into the- Waterpipe 16 (see Fig; 2), .forthe purpose of fur ther heating the water`'after it leaves ,theI

rovided with a Suitable y meansofsaid pipes 'loy chamber 12 and while onits Way ,to the For the pur ose of additionally lheating the water in te vchamber 12, vI provide .a heating coil 24' arranged in the smoke-box7 abovethe exhaust pipe 9. This coilis con@ nected to the chamber 12 byand 26, one connectedy with itheup er art and one with the lower art lofsaid o am er, so that a circulation `o water through said coil isconstantl maintained. A steamcoil 27is ypreferab y looatedin the upperpart of the fire-box, and this coil isconnected to the chamber 12 by thepipes 28 and 29 so that a. circulation of Water is constantly maintainedthrough the coil 27.

The heated water from the chamber 12 is conducted to the boiler through.the pipe 16, and I prefer to make four connections between ythis pipeand the Water-leg of the rounds `the lower part of the fire-box (seeFigs. 1 and 4). For this purpose I provide pipes 30 and 31extendinaround the outer wall of the fire-box, and Iiaving the branch pipes 32thatextend through the outer shell of the boiler, and that are providedwith check-valves 33. With this arrangement it will be seen that thefeed-Water enters-the' water-leg of the boiler near the lower endthereof. I also prefer to rovide a series of pipes 345, 34, at each sideo the fire-box, that `are connected at their lower ends to the water-legof the boiler, and at their up r ends to the crown-sheet. These pipesurnish means for rapidly heating the" water the pipes 25 X boiler, orthe portion of the boiler that surexhaust cylinders of th which,entering'the water-leg from the feed l, chamber, .and steam pipes havingsuitable pipe, willy move downward 'and will flow into i valves leadingfrom said exhaust pipes and said pipes, and pass upward through saidpipes in to the boiler above the crown-sheet. y this means there will beAarapid heating of the water soon after it enters the boiler.

It will be seen thatthe feed-Water-heater herein described insuresraising the water to a high temperature by means of the exhaust steamfrom the engine cylinders, and thereby utilizes the heat 4 from thissteam that would` otherwise be Wasted. The heating Icoil that is locatedin the upper part of the fire-box also aids materially in raising thetemperature of the feed-water. having the Water enter theboiler in thenarrow space around ,the lower part of the fireb'ox and then pass upwardthrough the ipes 34., additional heating is secured, an the productionof steam is greatly facilitated.

The details of the construction may be varied in many particularsWithout departing from my invention.

I claim as my invention:

1. .The combination, with a locomotive boiler, of a drum mounted thereonnear the smoke stack and having double walls with a non-heat-conductingmaterial between them, a chamber arranged within said-'- drum and spacedfrom the walls thereof, a water supply plpe connected with said chamber,a series of pipes arranged within said chamber having their ends openingthrpugh the ends of said chamber into the space between it and the wallsof said drum, pipes leading from the e ocomotive and opening into thespace between said chamber and drum and whereby the exhaust steam willbe admitted to said 'spaceand to said spirally coiled pipes in saidchamber, anda ipe leading from said chamber to the bo1ler, substantiallyas described.

2. The combination, with a boiler, of 'a drum mounted thereon, a chamberprovided within said drum and spaced from the walls thereof, a series ofpipes provided within said chamber and having their ends projectingthrough the heads ofsaidy chamber and com- `municating with the s acebetween said chamber and the walls o said drum, a water inlet pipecommunicating with the interior of said chamber, an outlet ipe leadingfrom said chamber to the holler, and exhaustv steam pipes leading romthe en ine cylinders and through the walls of said rum into the s acebetween it and said chamber, substantlallly as described.

3. The combination, with a boiler, of a drum mounted thereon, a chamberprovided within said drum and spaced fromthe wall thereof, a waterinletpipe for said chamber, an outlet pi e leading upward from the top ofsaidV cham er, exhaust steam pipes leading from the engine cylinder: andcommunicating with the space' between said drum and projecting into saidwater outlet pipe.

4. The combination, with a locomotive boiler having a stack and anexhaust nozzle arranged below the stack, of a drum mounted on sa1dboiler, a chamber arran edwithin.

wall of said chamber and the other' pi e,

through the upper wall thereof, substantla y as described.

5. The combination, with a boiler having a fire box,l of a chamber'located on said boiler, a water supply pipe for said chamber, a pipeleading from the top of said chamber to said boiler, a drum inclosingsaid chamber, pi es leading from the exhaust into the space etween said.drum and chamber, a coil arranged in the upper part of said fire box,and

pipes leading from said coil to said chamber, one of said pipes enteringthe lower walls of said chamber and the other pi e entering the up erwall of said chamber w ereby the circu ation of water from said chamberwill be established through the coil in said iire box.

6. The combination, with a locomotive boiler, o'f a chamber mountedthereon, a series of prilp'es provided within said'chamber, a water 1 etpipe communicating with the interior of sald chamber, an outlet pipeleading from said chamber to the boi er, drum heads provided at each endof'said chamber and s aced therefrom, and exhaust steam pipes eadingfrom the engine cylinder andl communicating with the spaces between saidchamberiand drum heads and through said amber, substantiallyas'described.

7 The combination, with a .locomotive boiler h'aving a stack and anexhaust nozzle arranged below said stack, a chamber mounted on saidboiler, a series of pipesprovided in said chamber, and extending throughthe heads thereof, drum heads provided at each end of said chamber andspacedlfrom the heads thereof, pipes leading from said exhau'st nozzleand communicating with the pipes in said chamber through the spacesbetween said heads, a water su ply pipe leading into said chamber, `anout et pipe leadin from said chamber to the boiler, a coil locatebetween said stack and said exhaust nozzle, pipes leading from said coiland one pipe extending through the lower wall of said chamber and theother pipe through the upper wall thereof. i

8. The combination, with a locomotive splaces with the pipes extendingthrough saidboiler havin a stack, and an exhaust vnozzle leading fromsaid coil and extending through 10 arranged be ow said stack, of achamber the Walls of said drum into said chamber, mounted on saidboiler, a drum in'lclosing said substantially as described.

chamber. and spaced from the Walls thereof, In Witness whereof,- I havehereunto set pipes leading from said nozzle into said drum, my hand'this 14th da of March 1906.

y a Water su ply pipe leading into said cham WIL IAM IrI.` BROWN.

ber, an out et pipe leadingfromsaid chamber vllVitnesses': to theboiler, a coil located between said. C. G.-I-IANSON,

, stack and said exhaust nozzle, and pipes A, C. PAUL.

